Sash-lock



w. HARLEV,1R. SASH LOCK.

APPLICATION FILED MAR- 30, I9I8.

Patented Sept. 13, 1921.

STTES WILLIAM HARLEV, JR., OF OAK PARK, ILLINOIS.

sAsH-Locx;

Application. filed March 30, 1918. l Serial No. 225,782.

To all fw hom it may con-Gry Be it known that l, lViLLLiM HAnLnv, Jr., a citizen ofthe United States, residing at Oak Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sash-Locks, of which the following is a specification.

This invention relates to a window catch which is provided with means for preventing the reverse rotation of the latching part so that it cannot be released by the insertion of a flat implementJ between the window sashes. It is therefore a safety catch, and it has a variable engaging member which can be moved toward or from the fixed catch member to vary the distance between the parts so that a more firm locking engagement may be obtained. Other objects willappear hereinafter. The invention consists in the novel construction, combination, and arrangement of the parts.

In the accompanying drawing,

Figure 1 is an elevation of asash lock constructed in accordance with the principles of this invention, in locked position;

Fig. 2 is a plan view of the same;

Fig 3 is a section taken on the line 3-3 of Fig. 1; and

Fig. 4 is a perspective of a fastening plate which may be applied to ythe catches commonly in use.

It is very often an easy matter to unlatch the window sash locks commonly used, from the outside of the windowby inserting a thin or pointed instrument between the sashes and moving the rotatable member until it is free from the catch. The present invention provides a ratchet lock that must be positively disengaged before the latch can be reversely rotated.

In this invention, an upper window sash 1 has a catch 2 applied to the lower-rail thereof by fastening screws l3 in the well known manner, with an overhanging engaging pointed projection 4, and with a preferably integral extension 5 which extends do-wnwardly along the face of the sash to which it is attached by fastening screws 6 at right angles to those inserted from the top, thus greatly strengthening the attachment of the catch, so that it can not be easily pried loose.

Instead of having an integral extension 5, a separate plate 7, as shown by Fig. 4, may be applied over the top of the ordinary specification 'of Letters Patent. Patented? Sept.

catches of this kind by inserting the screws 3 through screw holes S and the screws 6 through lholes 9. lith either form, a recess V10 is usually formed in the face of the Asash sok that the outer side of the extension 5 or the plate 7 will be flush with the surface, thus preventing the insertion of an instrument for prying it loose.

Attached to a lower window sash 11 by means of screws 12, is a latch comprising a'supporting base 13 having a slot 14 extending toward the catch 2, and a rotatable latching member 15 having an upstanding curved edge 16 for engaging under the projection 4, and an ear 17 forming a finger gripping portion for rotating it. Between the member 15 and thebase 13 is inserted a plate 1S having `an upstanding toothed edge 19 and a downturned tongue 20,;with a slot 21 opening from the lower edge thereof. The member 15 and this lplate 18 are pivotally connected by means of a rivet 22 which has an enlarged portion '23 slidable in the slot 14. and they are both attached to the base 13 by threaded opening 25 in 'which is an adjusting screw 26 having' a knurled head 27 and an adjacent reduced portion 28 by which the slot 21 of the tongue 20- is engaged, so that the rotation of the scr-ew 26 causes the movement of the plate 18, the member 15, and the connecting rivet 18, in the slot 14, depending upon the direction of rotation of the screw. By this adjustment, a more positive engagement is possible, and the inaccuracy of manufacture and setting are overcome.

Extending from the latching member 15 are ears 29 in which a pawl 30 is .pivoted that engages by gravity with the upturned teeth of the plate 18, so that asthe member 15 is rotated to engage its edge 16 with the proj ection 4 of the catch, the pawl will engage the teeth successively, preventing the reverse rotation of the member 15 until the pawl is tipped up or manually held out of engagement with the teeth.

This construction is simple, durable, and

inexpensive in construction, and is practically burglar proof. The adjustability makes it easy to take up shrinkage or Wear. It is obvious that others skilled inthe art to Which this relates may make various changes without depart-ing from the spirit and scope or' the invention, and therefore I do not Wish to be limited to the particular construction herein shown and described, except as specified in the following claims, in which I claim:

l. In a sash lock, a latch comprising a rotatable membera al supporting base for attachment to the sash, and means for adjustably mounting the member in the base.

2. In a sash lock, a latch comprising a rotatable member, a supporting base adapted to be fixed to the sash having a slot in which the member is rotatable, and means for independently adjusting the member in the slot.

3. In a sash lock, a base for attachment to to a sash,a latch comprising a rotatable latching member, a toothed plate attached thereto and adjustably mounted on the base, and means in connection with the member tor engaging the teeth of the plate and preventing reverse rotation. t

4L. In a sash lock, a latch comprising a rotatable latching member, a toothed plate to which the latching member is pivotally connected, a base in which the plate is slidable, said base being adapted to be attached to the sash, means for adjusting the plate in the base, and a paWl on the member to engage the teeth of the plate.

5. In a sash lock, a latch comprising a rotatable member, a plate to which the member is pivoted, having a depending slotted tongue, a base member in which the member and plate are adjustable, and adjusting means including` a. screw With a portion engaging the slot of said tongue.

6. In a sash lock,r a latch comprising a base member With a slot extending transversely thereof, a latching member, a toothed engaging plate therefor, a member for pivotally connecting the member and plate, hav ing a portion for slidably mounting them in the slot, and adjusting means threaded into the base member 'for engaging the plate and moving it and the connected latching member in the slot.

7. The Combination with an upper and lower Window sash, of a catch affixed to the upper sash, and a latch for the lower sash and comprising a supporting member rigidly attached thereto, a pivoted latching member, means for adjusting the latching member in the supporting member toward and from the catch, and locking means comprising a paivl attached to the latching member, and locking teeth engaged thereby as the latching member is rotated in a direction to engage the catch, preventing the reverse rotation of the latching member until the pavvl is manually raised.

IVILLIAM I-IARLEV, J R. 

